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mlj2015 7.4K Views
Apr 6, 2026 2:36 PM

MRCOOL Sale at Costco $300-$500 Off $1500

$1,500

$1,800

16% off
Costco Wholesale
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Costco just put their MRCOOL DIY mini-splits on sale, and Costco's prices were already better than elsewhere for these.

12K BTU ($1,500) - https://www.costco.com/mrcool-diy-5th-gen-12k-btu-ductless-mini-split-heat-pump.product.4000356449.h... [costco.com]

18K BTU ($1,900) - https://www.costco.com/mrcool-diy-5th-gen-18k-btu-ductless-mini-split-heat-pump.product.4000356856.h... [costco.com]

24K BTU ($2,300) - https://www.costco.com/mrcool-diy-5th-gen-24k-btu-ductless-mini-split-heat-pump.product.4000357312.h... [costco.com]

https://www.costco.com/s?keyword=mrcool
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About the Poster
Costco just put their MRCOOL DIY mini-splits on sale, and Costco's prices were already better than elsewhere for these.

12K BTU ($1,500) - https://www.costco.com/mrcool-diy-5th-gen-12k-btu-ductless-mini-split-heat-pump.product.4000356449.h... [costco.com]

18K BTU ($1,900) - https://www.costco.com/mrcool-diy-5th-gen-18k-btu-ductless-mini-split-heat-pump.product.4000356856.h... [costco.com]

24K BTU ($2,300) - https://www.costco.com/mrcool-diy-5th-gen-24k-btu-ductless-mini-split-heat-pump.product.4000357312.h... [costco.com]

https://www.costco.com/s?keyword=mrcool

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13 Comments

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Apr 6, 2026 4:45 PM
92 Comments
Joined Nov 2015
tristanofallsApr 6, 2026 4:45 PM
92 Comments
There always tradeoffs when going with a DIY-targeted thing like this, but not having to worry so much about vacuum pumps and volatile refrigerant makes this temmmpting. To say nothing of how hard it is to find an independent installer not already tied to one manufacturer.
Apr 6, 2026 4:48 PM
657 Comments
Joined Dec 2007
learnpApr 6, 2026 4:48 PM
657 Comments
Would've been great if Costco had included an option that included installation as well
Original Poster
Pro
Apr 6, 2026 6:50 PM
1.3K Comments
Joined Nov 2011
mlj2015
Original Poster
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Apr 6, 2026 6:50 PM
1.3K Comments
Quote from tristanofalls View quoted comment :
There always tradeoffs when going with a DIY-targeted thing like this, but not having to worry so much about vacuum pumps and volatile refrigerant makes this temmmpting. To say nothing of how hard it is to find an independent installer not already tied to one manufacturer.
I was looking at one of these or a Senville Elite Series. The issue with Senville is you have to have a pro come out and pressure test and connect the lines at the end, and lots of them won't work with owner-installed stuff, but I was able to find some in my area that would do that. It's true that a lot of companies won't help, but it seems that there are always some out there who will. The nice thing about MRCOOL is that you keep the warranty with full DIY install. However, those Senville Elite series have some super impressive efficiency ratings, especially the heating.
Last edited by mlj2015 April 6, 2026 at 11:54 AM.
Apr 6, 2026 7:46 PM
54 Comments
Joined Nov 2017
NoobingsApr 6, 2026 7:46 PM
54 Comments
What's the difference between this 12K unit and this one from Ace? Is it just the 1.7 seer rating difference? Is it worth the extra money then? https://www.acehardware.com/depar...c-shopping
Apr 6, 2026 7:58 PM
92 Comments
Joined Nov 2015
tristanofallsApr 6, 2026 7:58 PM
92 Comments
Quote from Noobings View quoted comment :
What's the difference between this 12K unit and this one from Ace? Is it just the 1.7 seer rating difference? Is it worth the extra money then? https://www.acehardware.com/depar...c-shopping
I'm not 100% sure, but the Ace one does not say "DIY" and says "conventional install," so I'd guess it's not the DIY line with the pre-charged lines. If so, you'd need a vacuum pump, pressure test, etc.
Original Poster
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Apr 6, 2026 10:26 PM
1.3K Comments
Joined Nov 2011
mlj2015
Original Poster
Pro
Apr 6, 2026 10:26 PM
1.3K Comments
Quote from tristanofalls View quoted comment :
I'm not 100% sure, but the Ace one does not say "DIY" and says "conventional install," so I'd guess it's not the DIY line with the pre-charged lines. If so, you'd need a vacuum pump, pressure test, etc.
Only the ones labeled DIY will have the quick connect lines. Otherwise, you'll need a professional to at least flare the ends, pressure test, and set the lines. You should expect to pay somewhere from $400-$800 for that.
Apr 7, 2026 2:03 AM
1.1K Comments
Joined Apr 2014
rypajoApr 7, 2026 2:03 AM
1.1K Comments
Have the 12k. It's a beast.

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Apr 7, 2026 2:51 AM
98 Comments
Joined Nov 2010
blobberApr 7, 2026 2:51 AM
98 Comments
Quote from mlj2015 View quoted comment :
Only the ones labeled DIY will have the quick connect lines. Otherwise, you'll need a professional to at least flare the ends, pressure test, and set the lines. You should expect to pay somewhere from $400-$800 for that.
Flaring the lines isn't complicated. Here's a tool at Home Depot for $56. I bought one new, still in the package, for about $20 on eBay.

https://www.homedepot.com/p/Husky.../305562710
Apr 15, 2026 2:59 AM
95 Comments
Joined May 2017
VegasJayApr 15, 2026 2:59 AM
95 Comments
Anyone have a Mr. Cool? Looks like a descent deal!
May 6, 2026 3:01 PM
373 Comments
Joined Oct 2014
TungV9142May 6, 2026 3:01 PM
373 Comments
Quote from mlj2015 View quoted comment :
I was looking at one of these or a Senville Elite Series. The issue with Senville is you have to have a pro come out and pressure test and connect the lines at the end, and lots of them won't work with owner-installed stuff, but I was able to find some in my area that would do that. It's true that a lot of companies won't help, but it seems that there are always some out there who will. The nice thing about MRCOOL is that you keep the warranty with full DIY install. However, those Senville Elite series have some super impressive efficiency ratings, especially the heating.
seems a lot of pros on DIY forums recommend Senville too. so sad those never have a sale though.
a lot of people sneer at Mr Cool because of leaks due to Quick Connects on their line sets. no idea how often that actually happens in reality.
Jul 2, 2026 9:32 PM
21 Comments
Joined May 2005
SyrihlJul 2, 2026 9:32 PM
21 Comments
For those looking Costco has these back on sale but maybe not as cheap as before?
Jul 11, 2026 5:37 PM
114 Comments
Joined Nov 2016
RogerP5065Jul 11, 2026 5:37 PM
114 Comments
Does anyone know if this is the best discount we can expect, or there was a better deal in the past? Wondering if I wait until winter if there will be a deeper discount. Likely won't install for months so not in a rush.
Jul 11, 2026 5:44 PM
1.2K Comments
Joined Feb 2024
AronManJul 11, 2026 5:44 PM
1.2K Comments
Quote from learnp View quoted comment :
Would've been great if Costco had included an option that included installation as well
the whole point of mr cool is diy
..

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